====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 Not tainted ------------------------------------------------------ syz.5.363/8185 is trying to acquire lock: ffff0000f12dbff8 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set_handle+0x2a8/0x5e4 fs/ocfs2/xattr.c:3501 but task is already holding lock: ffff0000d5218950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe4c/0x10dc fs/jbd2/transaction.c:442 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (jbd2_handle){++++}-{0:0}: start_this_handle+0xe74/0x10dc fs/jbd2/transaction.c:444 jbd2__journal_start+0x288/0x51c fs/jbd2/transaction.c:501 jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:540 ocfs2_start_trans+0x368/0x6ac fs/ocfs2/journal.c:352 ocfs2_modify_bh+0xe4/0x43c fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x104c/0x1364 fs/ocfs2/quota_local.c:771 dquot_load_quota_sb+0x6bc/0xa90 fs/quota/dquot.c:2459 dquot_load_quota_inode+0x274/0x4e4 fs/quota/dquot.c:2496 ocfs2_enable_quotas+0x17c/0x3b4 fs/ocfs2/super.c:930 ocfs2_fill_super+0x4018/0x5340 fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x360/0x414 fs/super.c:1636 get_tree_bdev+0x2c/0x3c fs/super.c:1659 ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184 vfs_get_tree+0x90/0x28c fs/super.c:1759 do_new_mount+0x228/0x814 fs/namespace.c:3884 path_mount+0x5b4/0xde0 fs/namespace.c:4211 do_mount fs/namespace.c:4224 [inline] __do_sys_mount fs/namespace.c:4435 [inline] __se_sys_mount fs/namespace.c:4412 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4412 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #3 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x35c/0x6ac fs/ocfs2/journal.c:350 ocfs2_modify_bh+0xe4/0x43c fs/ocfs2/quota_local.c:101 ocfs2_local_read_info+0x104c/0x1364 fs/ocfs2/quota_local.c:771 dquot_load_quota_sb+0x6bc/0xa90 fs/quota/dquot.c:2459 dquot_load_quota_inode+0x274/0x4e4 fs/quota/dquot.c:2496 ocfs2_enable_quotas+0x17c/0x3b4 fs/ocfs2/super.c:930 ocfs2_fill_super+0x4018/0x5340 fs/ocfs2/super.c:1140 get_tree_bdev_flags+0x360/0x414 fs/super.c:1636 get_tree_bdev+0x2c/0x3c fs/super.c:1659 ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184 vfs_get_tree+0x90/0x28c fs/super.c:1759 do_new_mount+0x228/0x814 fs/namespace.c:3884 path_mount+0x5b4/0xde0 fs/namespace.c:4211 do_mount fs/namespace.c:4224 [inline] __do_sys_mount fs/namespace.c:4435 [inline] __se_sys_mount fs/namespace.c:4412 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4412 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #2 (sb_internal#5){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:52 [inline] __sb_start_write include/linux/fs.h:1783 [inline] sb_start_intwrite include/linux/fs.h:1966 [inline] ocfs2_start_trans+0x1f4/0x6ac fs/ocfs2/journal.c:348 ocfs2_xattr_set+0xac4/0xe9c fs/ocfs2/xattr.c:3643 ocfs2_set_acl+0x574/0x628 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x190/0x25c fs/ocfs2/acl.c:286 set_posix_acl fs/posix_acl.c:954 [inline] vfs_set_acl+0x70c/0x974 fs/posix_acl.c:1133 do_set_acl+0xe0/0x1a8 fs/posix_acl.c:1278 do_setxattr fs/xattr.c:633 [inline] filename_setxattr+0x268/0x4f8 fs/xattr.c:665 path_setxattrat+0x2e8/0x320 fs/xattr.c:713 __do_sys_lsetxattr fs/xattr.c:754 [inline] __se_sys_lsetxattr fs/xattr.c:750 [inline] __arm64_sys_lsetxattr+0xc0/0xdc fs/xattr.c:750 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:867 [inline] ocfs2_reserve_suballoc_bits+0x12c/0x3b60 fs/ocfs2/suballoc.c:786 ocfs2_reserve_new_metadata_blocks+0x368/0x810 fs/ocfs2/suballoc.c:982 ocfs2_init_xattr_set_ctxt+0x318/0x774 fs/ocfs2/xattr.c:3277 ocfs2_xattr_set+0x920/0xe9c fs/ocfs2/xattr.c:3634 ocfs2_set_acl+0x574/0x628 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x190/0x25c fs/ocfs2/acl.c:286 set_posix_acl fs/posix_acl.c:954 [inline] vfs_set_acl+0x70c/0x974 fs/posix_acl.c:1133 do_set_acl+0xe0/0x1a8 fs/posix_acl.c:1278 do_setxattr fs/xattr.c:633 [inline] filename_setxattr+0x268/0x4f8 fs/xattr.c:665 path_setxattrat+0x2e8/0x320 fs/xattr.c:713 __do_sys_lsetxattr fs/xattr.c:754 [inline] __se_sys_lsetxattr fs/xattr.c:750 [inline] __arm64_sys_lsetxattr+0xc0/0xdc fs/xattr.c:750 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #0 (&oi->ip_xattr_sem){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1728/0x3058 kernel/locking/lockdep.c:5235 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5866 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 ocfs2_xattr_set_handle+0x2a8/0x5e4 fs/ocfs2/xattr.c:3501 ocfs2_init_security_set+0xb4/0xd8 fs/ocfs2/xattr.c:7307 ocfs2_mknod+0x106c/0x1cf0 fs/ocfs2/namei.c:419 ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3701 [inline] open_last_lookups fs/namei.c:3800 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4036 do_filp_open+0x18c/0x36c fs/namei.c:4066 do_sys_openat2+0x11c/0x1b4 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1455 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 other info that might help us debug this: Chain exists of: &oi->ip_xattr_sem --> &journal->j_trans_barrier --> jbd2_handle Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(jbd2_handle); lock(&journal->j_trans_barrier); lock(jbd2_handle); lock(&oi->ip_xattr_sem); *** DEADLOCK *** 8 locks held by syz.5.363/8185: #0: ffff0000d50f8420 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:556 #1: ffff0000f10e2640 (&type->i_mutex_dir_key#17){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #1: ffff0000f10e2640 (&type->i_mutex_dir_key#17){++++}-{4:4}, at: open_last_lookups fs/namei.c:3797 [inline] #1: ffff0000f10e2640 (&type->i_mutex_dir_key#17){++++}-{4:4}, at: path_openat+0x638/0x2c40 fs/namei.c:4036 #2: ffff0000f12ded80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #2: ffff0000f12ded80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b60 fs/ocfs2/suballoc.c:786 #3: ffff0000f10e6d80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #3: ffff0000f10e6d80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b60 fs/ocfs2/suballoc.c:786 #4: ffff0000f12ddf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #4: ffff0000f12ddf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x104/0x26a0 fs/ocfs2/localalloc.c:636 #5: ffff0000d50f8610 (sb_internal#5){.+.+}-{0:0}, at: ocfs2_mknod+0xc50/0x1cf0 fs/ocfs2/namei.c:361 #6: ffff0000d0f010e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x35c/0x6ac fs/ocfs2/journal.c:350 #7: ffff0000d5218950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe4c/0x10dc fs/jbd2/transaction.c:442 stack backtrace: CPU: 1 UID: 0 PID: 8185 Comm: syz.5.363 Not tainted 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2079 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain kernel/locking/lockdep.c:3909 [inline] __lock_acquire+0x1728/0x3058 kernel/locking/lockdep.c:5235 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5866 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 ocfs2_xattr_set_handle+0x2a8/0x5e4 fs/ocfs2/xattr.c:3501 ocfs2_init_security_set+0xb4/0xd8 fs/ocfs2/xattr.c:7307 ocfs2_mknod+0x106c/0x1cf0 fs/ocfs2/namei.c:419 ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3701 [inline] open_last_lookups fs/namei.c:3800 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4036 do_filp_open+0x18c/0x36c fs/namei.c:4066 do_sys_openat2+0x11c/0x1b4 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1455 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600